qml qt 5.12 using modules controls1 and controls2 in one program - qt

Question

I can't use QtQuick.Controls 1.2 and QtQuick.Controls 2.12 in one program. Although in Qt 5.10 this worked. Now I get this message when I load main.qml:
"qrc:/MyButton.qml 2 module QtQuick.Controls 2.12 is not installed"
Qt 5.12. Build on macOS for ios or ios emulator.
pro file
QT += quick quickcontrols2
CONFIG += c++11
DEFINES += QT_DEPRECATED_WARNINGS
SOURCES += \
main.cpp
RESOURCES += qml.qrc
QML_IMPORT_PATH =
QML_DESIGNER_IMPORT_PATH =
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target
main.qml
import QtQuick 2.9
import QtQuick.Window 2.2
import QtQuick.Controls 1.2
Window {
visible: true
Button {
id: button1
text: "Controls 1 button"
anchors.centerIn: parent
}
MyButton {
text: "Controls 2 button"
anchors {
top: button1.bottom
horizontalCenter: parent.horizontalCenter
}
}
}
MyButton.qml
import QtQuick 2.9
import QtQuick.Controls 2.12
Button {
}
main.cpp
#include <QGuiApplication>
#include <QQmlApplicationEngine>
int main(int argc, char *argv[])
{
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
if (engine.rootObjects().isEmpty())
return -1;
return app.exec();
}
qml.qrc
<RCC>
<qresource prefix="/">
<file>main.qml</file>
<file>MyButton.qml</file>
</qresource>
</RCC>
Perhaps there are some restrictions or rules that need to be followed to make it work? If use only Constools 1.2 or only Constols 2.12, then main.qml loaded successfully.
p.s. Build on windows for windows and build on windows for android works fine. The problem is only with build on mac os for ios/ios emulator.